class_docstr: {0,1,...,n-1}
  
  Example usage:
  self.observation_space = spaces.Discrete(2)
code: def __init__(self, n):
      self.n = n
  
file_path: keras-rl/utils/gym/spaces/discrete.py
imports: import numpy
  import gym
  from ..None import prng
label_desc: Use image node_id 1 to create a new Discrete object from inherited base classes: gym with example: obj = Discrete(n)